Automatic train-stop.



H. H. YOUNG &: H. H. DONOVAN.

AUTOMATIC TRAIN STOP. APPLICATION FILED SBPT.30,1914.

Patented Feb. 2, 1915.

0m; 5 6 Z w MMW Aii'orney THE NORRIS PETERS 60.. PHOTO-LITHtL. WASHINGTON. A C

rrn STATES PATENT HERMAN H. YOUNG AND HENRY H. DONOVAN, OF RIVERSIDE, RHODE ISLAND.

AUTOMATIC TRAIN-STOP.

Application filed September 30, 1914.

To all whom it may concern Be it knownthat we, HERMAN H. YOUNG and HENRY H. DONOVAN, both citizens of the United States, residing at Riverside, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Automatic Train-Stops, of which the following is a specification.

Our invention relates to devices for operating mechanism to prevent accidents, derailments, collisions and the like, and has for its essential objects automatic action independent of human agency; to provide a' simple and eifective venting means for the train air brake system, and to attain these ends in. a structure certain in action, and easy to construct.

To the above ends essentially our invention consists in such parts and combinations of parts as fall within the scope of the appended claims.

Figure 1 is a side elevation of a locomotive equipped with our stop, the latter being shown in side elevation, Fig. 2, a perspective View of the road bed and the tripping mechanism, Fig. 3, an enlarged side elevation of the stop device, Figs. 4 and 5, sections on lines m and y y of Fig. 3 respectively, and Fig. 6 a longitudinal section of the valve.

Like reference characters indicate like parts throughout the views.

A tripping mechanism which may be of any prefererd construction best adapted for setting in operation the stop device, comprises in the present instance, a rock shaft 7 disposed transversely of the track rails 9 mounted in bearings 10 upon the road bed. Fast to this shaft is a finger 12, and arms 14 and 15. The former arm is connected by a wire 17 to a switch lever; and the arm operates a semaphore arm 18 on a post 19 through a wire 20 attache to an arm 21 fast on a rock shaft 22 journaled in supports 23 on the bed. An arm 24 fast on shaft 22 is connected by a wire 26 to the semaphore arm 18. By vibrating the arm 14 through the wire 17 from the switch tower the finger may be elevated to a vertical tripping position or to a horizontal nontripping position.

The operating mechanism comprising our stopping device, and which is set in operation by the tripping mechanism, is mounted in any convenient place upon the locomotive body; and the particular method of attach Specification of Letters Patent.

Patented Feb. 2, 1915.

Serial No. 864,255.

ing or mounting the mechanism may be that best adapted for the particular locomotive in use. In the present instance it is shown in conjunction with a locomotive 28, the lower portion of whose frame comprises side bars 30 and an inclined brace 32. Integral with or fixed to the side bars 30 by screws 34 are plates 35 having near their ends depending or depressed cross bars or plates 37, provided midway their length with openings 38 to slidably receive a rod 39 pivoted at one end by pin or knuckle joint 40 to a rod 42 whose outer end is provided with an eye 45 which loosely receives a cross rod or bar 47 fixed in the arms 48 of a yoke which is completed by a body 49. This yoke is pivotally mounted upon the bars 30 from which it depends. The pivotalattachment in this instance is eifectedby a cross bar 51 in the bars 30 passing through openings 53 in the free ends of the yoke arms. Fast to the rod 39 intermediate the members 37 is a bearing plate 55 against which abuts one end of a helical spring 56 whose other end bears against the second member 37 This spring acts as a shock absorber.

In the rear of the members 87 is a cross bar'58 in the bars 30 upon which is mounted a lever 59 comprising two angularly disposed arms 60 and 61 and provided with a hole 68 to loosely receive the bar 58. The depending arm 60 which is the longer, is in horizontal alinement with the rod 39 and in the path thereof. The end of arm 61 normally bears against the end of the valve stem 65 of a train pipe valve 57 in a branch 59 of the train air pipe 60. The valve may be of any usual preferred construction. In the present instance it comprises a casing 62, seat 63, and valve or member 64. A nut 66 is fixed to the valve stem near its end, and a helical spring 67 on the stem has one end in contact with the nut, and its other broken lines in Fig. 3, thus releasing the latter, and the valve leaves its seat through the action of spring 67. This allows the air to escape from the train pipe and set the brakes of the train.

What we claim is,-

1. In an automatic train stop, the combination With the train pipe, of a frame, a

neoted at its upper end to the main frame, guide plates upon the main frame, a rod slidabl'y mounted in the plates, a second rod pivotally connected With the rod and With the contact frame, a plate upon the first rod, a spring upon the first rod bearing against the last plate and one of the first plates, a valve'having a stem, and a releasing member upon the first frame in the path of the first rod and in contact With the valve.

In testimony whereof We have afiixed our signatures in presence of two Witnesses.

HERMAN H. YOUNG. HENRY H. DONOVAN.

lVi-tne'sses:

HoRA'rro E. BELLOWS, CHARLES J. OCoNNoR.

Copieswf this patent may beobtained for five cents each, by addressing the Gommissioner of Patents,

Washington, I); G. 

